docs: def read_word(image, whitelist=None, chars=None, spaces=False):
      """ OCR a single word from an image. Useful for captchas.
          Image should be pre-processed to remove noise etc. """
      from tesserocr import PyTessBaseAPI
      api = PyTessBaseAPI()
      api.SetPageSegMode(8)
      if whitelist is not None:
          api.SetVariable("tessedit_char_whitelist", whitelist)
      api.SetImage(image)
      api.Recognize()
      guess = api.GetUTF8Text()
  
      if not spaces:
          guess = ''.join([c for c in guess if c != " "])
          guess = guess.strip()
  
      if chars is not None and len(guess) != chars:
          return guess, None
  
      return guess, api.MeanTextConf()